OPTIMER PHARMACEUTICALS INC

CUSIP: 68401H104 Class: CMN

CALIFORNIA PUBLIC EMPLOYEES RETIREMENT SYSTEM's Holding History (CIK: 0000919079)

Note: Option positions (PUT/CALL) are excluded.

Q3 2013
Shares 48,230 Value ($000) $608 Avg Close — Range —
Q2 2013
Shares 35,030 Value ($000) $507 Avg Close — Range —